the question becomes what do you want to do with your GEO beyond ringing a bell? GEO is capable of a lot and it is going to depend what you want to do with it to determine how much more gear you need.
If you haven't already, start doing Sinister Reign. there is a lot of good gear for a lot of jobs available here. GEO specific you will want Medium's Sabots for casting Geomancy spells. Additionally, the club Divinity is fun for when you want to crack some skulls, and Rubicundity is best for Aspir/Drain as well as good for nuking until you have a Solstice.
Speaking of Solstice, it's an incredibly versatile club for the non-Idris crowd: skill, Magic Accuracy/MAB, it's really good but the drop rate is ***.
Ggetting an Incanter's Torque from Escha Ru'Aun is going to give you a lot of distance with all your Geomancy spells, as you are going to be far away from the 900 skill cap.
If you want to nuke, you are going to want Amalric gear from Escha Ru'Aun. short of that, Skirmish head/hands/legs/feet are going to be your best option, while nuking in your Empyrean +1 body.
Culminus Shield from the Ultima/Omega High Level BCNM is an excellent nuking piece to complement your Solstice/other nuking gear.
If you want to swing away at enemies with your club(s), the Telchine set can be made into good melee pieces, personally I haven't the time for that, made a melee based Telchine Cap and rock an Onca Suit for my other main slots.